Mark Nguyen, MD
NPI 1427348150ActiveIndividual· Internal Medicine, Nephrology· Portland, OR
Internal Medicine, Nephrology (MD) with Northwest Renal Clinic Inc, practicing in Portland, Oregon. Their prescriptions cost Medicare Part D more than their services did: $293,853 for 1,774 claims, against $120,517 paid for services in 2024. Scpharmaceuticals Inc. was the largest of 6 companies reporting payments in 2025, $142.04 in all, mostly food and beverage. Lists Legacy Emanuel Medical Center and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1427348150 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 14, 2011 |
| Last updated in NPPES | Sep 25, 2025 |
| Certified by provider | Sep 25, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | MD183639 | OR |
| Internal Medicine, Nephrology | 207RN0300X | MD60742774 | WA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 318 |
|---|---|
| Services billed | 1,134 across 22 procedure codes |
| Paid by Medicare | $120,517 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,774 · 4,076 30-day fills |
|---|---|
| Patients | 353 |
| Total drug cost | $293,853 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- Northwest Renal Clinic IncPortland, OR · 40 clinicians
Hospital affiliations
- Legacy Emanuel Medical CenterPortland, OR
- Legacy Good Samaritan Medical CenterPortland, OR
- Ohsu Hospital and ClinicsPortland, OR
- Providence Hood River Memorial HospitalHood River, OR
- Skyline HospitalWhite Salmon, WA
Other facilities
- Fmc Scholls FerryDialysis facility · Portland, OR
- Fresenius Kidney Care PiedmontDialysis facility · Portland, OR
Industry payments (Open Payments)
- 2025$142.04 · 7 payments from 6 companies
- 2024$108.58 · 6 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Scpharmaceuticals Inc. | $41.64 | 2 |
| Veloxis Pharmaceuticals, Inc. | $31.46 | 1 |
| Bayer Healthcare Pharmaceuticals Inc. | $19.67 | 1 |
| Glaxosmithkline, LLC. | $17.89 | 1 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $17.33 | 1 |
What the 2025 payments were for
- Food and Beverage$142.04 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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